Furnace



H. H. PEEK.

FURNACE.

APPLICATION FILED APR. 12. 1920.

Patented Dec. 13, 1921.,

4 SHEETS-SHEET 1.

INVENTOR A'ITORNEY H. H. PEEK.

FURNACE.

APPLICATION HLED APR.I2,1920.

'1 ,400,454:.- Patented Dec. 13, 1921.

4 $HEET$-SHEET 2.

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H. H. PEEK.

FURNACE.

APPLICATION FILED APR.|2, 1920.

Patented Dec. 13, 1921.

4 SHEETS-SHEET 3.

ATTORNEY WITNESSES,

1 ,400,4:54. I 4 Patented Dec. 13, 1921.

SHEETS-SHEET 4.

INVENTOR ATTORNEY UNITED STATES PATENT OFFlCE.

HORACE H. PEEK, 0F CHATT ANOOGA, TENNESSEE.

FURNACE.

Application filed April 12,

To aZZ whom it may concern Be it known that I, Honacn H. PEEK, a citizenof the United States of America, residing at Chattanooga, in the countyof Hamilton and State of Tennessee, have invented new and usefulImprovements in Furnaces, of which the following is a specification.

This invention relates to furnace constructions, and has foran objectthe provision of a down draft furnace, which is especially designed as apipe heating furnace, although it will be apparent that it may be usedfor heating material or objects of any character.

Another object of the invention is the provision of a furnace in whichthe heat units are evenly distributed to all parts of the heatingchamber or oven, so as to uniformly heat the contents thereof, thisresult being accomplished by novel arrangement of gas and fresh airdistributing passages, the latter mixing with the products of combustionat the top of the bridge wall, to aid in the combustion of fineparticles of fuel.

Another object is the provision of a fur nace in which the hot gases aretaken out upon each side of the hearth through a plurality of passages,thereby insuring an even distribution throughout the oven.

A. further object is the provision of a plurality of separate dampercontrolled draft passages, with which the gas distributing passagescommunicate, the draft passages regulating through their dampers. the

amount of draft or suction from each end of the draft passage, so thatthe products of combustion may be drawn through the oven and distributedover the ovens contents at the proper degree.

Other objects and advantages of the in vention will appear as thefollowing description is read in connection with the accompanyingdrawings,

In the drawings:

Figure 1 is a vertical sectional view through a furnace embodying thepresent invention, the section being taken on the line 11 of Fig. 2.

Fig. 2 is a horizontal sectional view on the line 22 of Fig. 1.

Fig. 3 is a vertical section on the line 3-3 of Fig. 2.

Fig. 4 is a horizontal section on the line 44 of Fig. 1.

Referring specifically to the drawings,

Specification of Letters Patent.

Patented Dec. 13, 1921.

1920. Serial No. 373,447.

wherein like characters of reference denote corresponding parts, thefurnace comprises an outer casing, which is preferably formed of sheetsteel and indicated at 10, an inner lining 11 of asbestos, a secondlining 12 of red brick, within which is placed an additional lining offirebrick 13. lVhile this provides a very effective construction of heatinsulating wall, it is not the purpose of the present application to beconfined to this particular structure, which may be varied as cesired.

Located in one end of the furnace is a pair of fire boxes 14, to whichaccess is attained through feed doors 15 located upon opposite sides ofthe furnace, the fire boxes being separated by a wall 16. Beneath thefireboxes and separated therefrom by a grate 17 is an ash pit 18, whichmay extend the entire width of the furnace beneath both fire boxes andbe provided with a door at each end.

Also located within the fnurnace is a heating chamber or oven 19, thelatter being separated from the fire boxes 17 by means of a bridge wall20. The oven 19 extends the entire width of the furnace and is providedat one end with a charging door 21 and at its opposite end with adischarging door 22. Extending over the tops of both fire boxes 17 andthe oven 19, is a crown or dome 23, the curvature of which directs theproducts of combustion which rise fromthe fire boxes 17, across thebridge wall and downward into the heating chamber or oven 19.

For the purpose of supplying fresh air to the interior of the furnacefor mixture with the gases, and to aid in consuming the line particlesof fuel, there i provided beneath the oven extending transversely of thefurnace, a fresh air inlet 24. This fresh air inlet is in the form of apassage open at each end and communicating with this passage is aplurality of spaced passages 25, both the passages 24 and 25 beinghorizontally arranged. Each of the last mentioned passages is providedwith oppositely and inwardly extending passages 26, which meet andcommunicate with vertical passages 27 extending upwardly through thebridge wall 20 and opening at the top thereof. The fresh air is thusdelivered to the hot gases a they rise from the fire box and between thesaid fire box and the oven.

Extending from the opposite sides of the oven 19 is a number ofhorizontally alined openings 28, these openings being arranged anappreciable distance below the top of the walls of the oven, andcommunicating with verticallyarranged passages 29. They passages 29extend downwardly and at their bottoms communicate with horizontally arranged draft passages 30, the passages 29 being arranged oppositely andin pairs and each pair beingin communication with an individual draftpassage. The passages 30 have one end open to the atmosphere asindicated at 31'and have their opposite ends in communication with theflue 32, so that a draft is established through the passages 30, whichwill suck the gases through the passages 29 at each side of the oven 19.Each draft passage 30 is provided with a damper 88 for controlling thedraft and by manipulating each of the dampers, the distribution of heatthrough the oven may be regulated.

The invention is susceptible of various changes in its form, proportionsand minor details of construction, and the right is herein reserved tomake such changes as properly fall within the Scope of the appendedclaims. 7

Having described the invention what is claimed is v ,1. A furnacecomprising a casing, a heating chamber or oven located therein, a firebox located at oneside of the oven and separated therefrom by a bridgewall, a crown wall or dome covering the oven, and fire box for directingthe products of combustion from the latter across the bridge wall intothe former, fresh air passages opening through the top of the bridgewall and a plurality of passages connecting with the oven through theside walls in a plane below the fresh air inlets for conducting thegases to the atmosphere.

2. A furnace, comprising a casing, a heating chamber or oven locatedtherein, a fire box located at one side of the oven and separatedtherefrom by a bridge wall, a crown wall or dome covering the oven andfire box for directing the products of combustion from the latter acrossthe bridge wall, spaced vertical draft passages arranged upon oppositesides of and communicating with the oven through said walls at a pointbelow the top thereof, longitudinal passages extending between the ovenand establishing communication between the verticalgas passages and theatmosphere and fresh air passages extending through the bridge wall andopening through the .top of the latter for mixing fresh air. with theproducts of combustion.

3. A furnace comprising a fire box, a heating chamber or oven, means fordirecting the products of combustion from the fire box into the top ofthe oven, air'passages for directing a supply of fresh air into the pathof the products of combustionbefore they enter the oven, a plurality ofgas passages leading from the oven and separate damper controlledpassages communicating with the gas passages and open at both ends tothe atmosphere. Y

4. A furnace comprising a casing, a heat ing chamber located therein, afirebox 1a cated at one side of said chamber and sepa:

rated therefrom by a bridge wall, a crown wall covering the chamber andfire boxfor directing the products of combustion from the latter acrossthe bridge wall into the formenfresh air passages entering through thetop of the bridge wall anda plurality of damper controlledpassageshorizontally arranged beneath said fresh air inlets and curvedat one end for conducting the gases to the atmosphere. p i

In testimony whereof I affix my signature.- 7 7 VHORACE H. PEEK;

